[1] Exogenous growth of Peléean lava domes involves the addition of lava from a central summit vent and mass wasting on the flanks as rockfalls and pyroclastic flows. These processes were investigated at the Soufrière Hills Volcano, Montserrat, between 30 March and 10 April 2006, using a ground-based imaging millimeter-wave radar, AVTIS, to measure the shape of the dome and talus surface and ro...

Introduction: Lunar volcanism creates a wide variety of features such as domes, rilles, and large pyroclastic deposits. Mapping the subsurface column structure of the upper part of these deposits can provide key information about how they were formed and how the surface regolith developed through subsequent weathering. In addition, many possible lunar landing sites (e.g., the Constellation site...

Extremely light and highly variable δ60Ni values have been observed in komatiite-associated magmatic sulfides recent studies. In this study, we examine the mechanisms of Ni isotope fractionation between silicate sulfide liquids Hart Fe-Ni-Cu-sulfide system. We assess petrogenetic significance these using concentration data. The bulk rock varies from 774 to 2690 ppm komatiite samples with no min...

Introduction: Recent researches are shedding new lights on the evolution of Valles Marineris and neighboring chaotic terrain and outflow channels. For example , Chapman and Tanaka [1] proposed a hypothesis with an emphasis on magma-ice interactions for the formation of chasmata, interior deposits, chaotic terrain , outflow channels, and surface materials. Terrestrial analog studies are useful i...

Introduction: The very high temperatures that have been reported for lavas on Io [e.g., 1-4] have proven to be difficult to explain [5,6]. Specifically, the estimates of lava temperatures ≥1600 °C require that the interior of Io either (1) have an extremely unusual chemistry or (2) be almost completely molten. Neither of these possibilities fits within our current understanding of the evolution...

The magma ocean concept was first conceived to explain the geology of Moon, but hemispherical or global oceans silicate melt could be a widespread “lava world” phase rocky planet accretion, and persist on planets short-period orbits around other stars. formation crystallization defining stage in assembly core, origin crust, initiation tectonics, an atmosphere. last decade has seen significant a...

introduction the mn mineralization occurs in the northeastern segment of the sabzevar zone (sz), north of the central iranian microcontinent (cim). this zone (sz) is located between the cim fragmentation in the south and the kopeh dagh sedimentary sequence in the north. the ore deposits of the northeastern segment of the sabzevar zone can be divided into three groups, each with different metal ...

kuh- e -zar gold deposit located 35 km west of torbat-e-heydaryeh, (khorassan e- razavi province), east of iran. this deposit is a specularite-rich iron oxide type (iocg). this mine is situated within khaf-bardascan volcanic plutonic belt. based on recent exploration along this belt, several iocg type system plus kuh-e-zar deposit are discovered. in the study area, several type of tuff and lava...

[1] Lunar sinuous rilles have long been interpreted as features that formed as the result of surficial lava flow, though the precise mechanism responsible for channel formation (constructed versus eroded origins) is still debated. In assessing the origin of Rima Prinz, a channel interpreted to have formed by erosion, two erosion regimes, mechanical and thermal, are considered. Measurements of c...